class RegistrationTest(unittest.TestCase):
def setUp(self):
self.register = Registration()
def test_register_creation(self):
self.assertIsInstance(self.register, Registration)
def test_user_bio_length(self):
self.register.add('*****@*****.**', 'john', 'mike')
self.assertEqual(self.register.user_bio_length(self.register.user_bio),
1)
def test_add_user(self):
self.register.add('*****@*****.**', 'John doe', 'mike')
self.assertEqual(len(self.register.user_bio), 1)
# def test_check_file_exist(self):
# pass
# def test_add_member(self):
# pass
def test_missing_key(self):
with self.assertRaises(KeyError):
self.register.get_email('*****@*****.**')
@unittest.skip('WIP')
def test_unknown_method(self):
pass #self.assertEqual(self.register.some_method(), 1)
class ICSDNController(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_4.OFP_VERSION]
'''
This file implement the controller.
Ryu is an event-driven controller that you can handle events separately.
==============================
=========== Events ===========
Events are defined with a python decorator "@set_ev_cls" and it takes
two arguments:
- Event: (EventOFPxxxxx)
+ EventOFPSwitchFeatures: Controller response on switch establishment
+ EventOFPPacketIn: Controller receive message from a switch
- Event argument:
+ CONFIG_DISPATCHER: Ignore events before handshake
==============================
========= Parameters =========
In this section important parameters are described:
- datapath: Controller-switch negotiation path
- datapath.ofproto: OpenFlow definitions
- datapath.ofproto_parser: Wire message for encoder/decoder
==============================
======== Our protocol ========
-- get "protocol" field in IP header
-- case protocol:
---- 150 : NDN interest packet
---- 151 : NDN data packet
---- else: other tcp/ip packets
'''
def __init__(self, *args, **kwargs):
super(ICSDNController, self).__init__(*args, **kwargs)
# CONF = cfg.CONF
# CONF.register_opts([
# cfg.StrOpt('experimnet', default='ds100ms__dsh_1ms', help = ('The experiment by the parameters'))], group='NETPARAM')
print (CONF.netparam.exp)
self.log_file='./Out/' + CONF.netparam.protocol + '/' + CONF.netparam.exp + '/' + CONF.netparam.smpl
if os.path.exists(self.log_file) is not True:
os.makedirs(self.log_file)
self.switches = []
self.links = []
self.mac_to_port = {}
self.topology_api_app = self
self.net = nx.DiGraph() # Directional graph to set output_port
self.INTEREST_PROTOCOL = 150
self.DATA_PROTOCOL = 151
self.REGISTER_PROTOCOL = 152
self.HELLO_LABEL = 932620
f = os.system('ifconfig > ifconfig')
f = open('ifconfig', 'r+').read()
# f = open('/proc/net/arp', 'r').read()sc
mac_regex = re.compile("(?:[0-9a-fA-F]:?){12}")
self.CONTROLLER_ETH = mac_regex.findall(f)[0]
self.INTEREST_PORT = 9997
self.DATA_PORT = 9998
self.RIB = Registration()
self.switches_dp=dict()
self.icn_switches = []
self.packet_in_num = 0
threading.Thread(target=self.packet_in_rate).start()
# self.nodes = {}
# self.links = {}
# self.no_of_nodes = 0
# self.no_of_links = 0
# self.i = 0
def packet_in_rate(self):
T = float(10)
f = open(self.log_file+'/controller_log','w')
f.close()
pre_num = 0
while (True):
time.sleep(T)
rate = (self.packet_in_num - pre_num)/T
pre_num = self.packet_in_num
f = open(self.log_file+'/controller_log','a')
print(rate,file=f)
f.close()
@set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
def switch_features_handler(self, ev):
"""
Handle switch features reply to install table miss flow entries.
TIP: You can keep this function without any change and reuse it.
:param ev: Event
:return:
"""
datapath = ev.msg.datapath
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
self.switches_dp.update({datapath.id:datapath})
if datapath.id in self.icn_switches:
print("insert initial rules in ICN switch "+str( datapath.id))
# install table-miss flow entry
#
# We specify NO BUFFER to max_len of the output action due to
# OVS bug. At this moment, if we specify a lesser number, e.g.,
# 128, OVS will send Packet-In with invalid buffer_id and
# truncated packet data. In that case, we cannot output packets
# correctly. The bug has been fixed in OVS v2.1.0.
match = parser.OFPMatch() # Match everything
actions = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
ofproto.OFPCML_NO_BUFFER)]
'''
Add a flow(role) with priority 0 (lowest priority) in order to
send mismatched requests to the controller
'''
self.add_flow(datapath, 0, 0, match, actions)
self.add_flow(datapath, 1, 0, match, actions)
self.add_flow(datapath, 2, 0, match, actions)
self.add_flow(datapath, 3, 0, match, actions)
# Add a role to goto table 1 for first interest packets from clients
# and goto table 2 for other INT and Data packets
ins = [parser.OFPInstructionGotoTable(table_id=1)]
match = parser.OFPMatch(eth_type=ether_types.ETH_TYPE_MPLS)
self.add_flow(datapath, 0, 2, match, None, instruction=ins)
ins = [parser.OFPInstructionGotoTable(table_id=2)]
match = parser.OFPMatch(eth_type=ether_types.ETH_TYPE_IP,ip_proto=self.INTEREST_PROTOCOL)
self.add_flow(datapath, 0, 2, match, None, instruction=ins)
match = parser.OFPMatch(eth_type=ether_types.ETH_TYPE_IP,ip_proto=self.DATA_PROTOCOL)
self.add_flow(datapath, 0, 2, match, None, instruction=ins)
ins = [parser.OFPInstructionGotoTable(table_id=3)]
match = parser.OFPMatch(eth_type=ether_types.ETH_TYPE_IP,ip_proto=self.INTEREST_PROTOCOL)
self.add_flow(datapath, 2, 1, match, None, instruction=ins)
match = parser.OFPMatch(eth_type=ether_types.ETH_TYPE_IP,ip_proto=self.DATA_PROTOCOL)
self.add_flow(datapath, 2, 1, match, None, instruction=ins)
#
# ins = [parser.OFPInstructionGotoTable(table_id=1)]
# match = parser.OFPMatch(eth_type=ether_types.ETH_TYPE_MPLS,
# ip_proto=self.DATA_PROTOCOL)
# self.add_flow(datapath, 0, 3, match, None, instruction=ins)
## Send to controller if incoming packet is a registration one
match = parser.OFPMatch(eth_dst = self.CONTROLLER_ETH, eth_type=ether_types.ETH_TYPE_MPLS)
actions = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
ofproto.OFPCML_NO_BUFFER)]
self.add_flow(datapath, 0, 2, match, actions)
else:
print("insert initial rules in legacy switch "+str( datapath.id))
match = parser.OFPMatch() # Match everything
actions = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER,
ofproto.OFPCML_NO_BUFFER)]
'''
Add a flow(role) with priority 0 (lowest priority) in order to
send mismatched requests to the controller
'''
self.add_flow(datapath, 0, 0, match, actions)
self.add_flow(datapath, 1, 0, match, actions)
ins = [parser.OFPInstructionGotoTable(table_id=1)]
match = parser.OFPMatch()
self.add_flow(datapath, 0, 1, match, None, instruction=ins)
def add_flow(self, datapath, table_id, priority, match, actions, instruction=None):
"""
Add entry to switch table
:param datapath: target switch
:param table_id: id of table!
:param priority: higher number means higher priority
:param match: which flows match this entry
:param actions: what to do for matched flow
:param instruction: set for instruction commands such as GotoTable
:return: null
"""
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
if not instruction:
inst = [parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions)]
mod = parser.OFPFlowMod(datapath=datapath, table_id=table_id,
priority=priority,
match=match, instructions=inst)
elif not actions:
mod = parser.OFPFlowMod(datapath=datapath, table_id=table_id,
priority=priority, command=ofproto.OFPFC_ADD,
match=match, instructions=instruction)
else:
action_list = [parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions)]
inst = action_list + instruction
mod = parser.OFPFlowMod(datapath=datapath, table_id=table_id,
priority=priority, command=ofproto.OFPFC_ADD,
match=match, instructions=inst)
datapath.send_msg(mod)
def packet_decode(self,pkt):
"""
Decode a packet and create a dictionary of its fields
:param pkt: target packet
:return: if packet is a LLDP it returns None,
otherwise it returns the dictionary of its fields
"""
fields = dict()
########################################
# Layer2 information of packet(Ethernet)
eth = pkt.get_protocol(ethernet.ethernet)
fields['eth_type'] = eth.ethertype
# Ignore lldp(Link Layer Discovery Protocol) packet
if fields['eth_type'] == ether_types.ETH_TYPE_LLDP:
return None
# ethernet src and dst of packet
fields['eth_dst'] = eth.dst
fields['eth_src'] = eth.src
#############
# MPLS header
mpls_header = pkt.get_protocol(mpls.mpls)
if mpls_header:
print ('mpls header')
fields['mpls_label'] = mpls_header.label
print (fields['mpls_label'])
else:
fields['mpls_label'] = -1
ip = pkt.get_protocol(ipv4.ipv4)
if ip:
print('ip payload:')
fields['ip_src'] = ip.src
fields['ip_dst'] = ip.dst
fields['ip_protocol'] = ip.proto
else:
fields['ip_protocol'] = -1
return fields
def lookup_out_port(self,msg_data_path, ip_src, content_label=None, ip_dst=None):
if content_label is not None:
print ('searching ', content_label)
publisher = self.RIB.lookup(content_label)
else:
publisher = dict({'ip':ip_dst})
if publisher is not None and publisher['ip'] in self.net:
print('lookup path for ' + str(publisher['ip']) + ' from ' + str(ip_src))
path = nx.shortest_path(self.net, ip_src, publisher['ip'])
# for switch in path[1:]:
#dpid = msg_data_path.id
return publisher['ip'], path
# next_hop = path[path.index(dpid)+1]
# #dpid = next_hop
# #datapath = api.get_datapath(self, dpid)
# print ('forward to: ',out_port)
# return [out_port,publisher['ip']]
else:
print ('flood')
#out_port = msg_data_path.ofproto.OFPP_FLOOD
#if pkt_fields['eth_dst'] != "ff:ff:ff:ff:ff:ff":
#return [out_port,'']
return '',msg_data_path.ofproto.OFPP_FLOOD
def encode_flow_id(self, ip_src,ip_dst):
fields_src=ip_src.split(".")
fields_dst=ip_dst.split(".")
return fields_src[3]+'.'+fields_src[2]+'.'+ fields_dst[3]+'.' + fields_dst[2]
def lookup_flow_id_path(self, flow_id):
return self.RIB.get_flow_path(flow_id)
def create_mpls_datapath(self, msg, pkt_fields):
"""
Add a flow in table 1 for pop mpls header and set appropriate
IP destination and then goto table2
In table 2 for interest packets, tos field is set to be the in_port
and then interest and data packets goto table 3
In table 3 forwarding rules for interest or data packets are added
:param msg: target incoming msg
:param pkt_fields: the fields of incoming interest packet
:param oport: the port to forward packet on if necessary
:return: created packet_out
"""
msg_datapath = msg.datapath
parser = msg_datapath.ofproto_parser
iport = msg.match['in_port']
ip_dst, next_ports = self.lookup_out_port(msg_datapath, pkt_fields['ip_src'],
content_label=pkt_fields['mpls_label'])
if ip_dst=='':
return
flow_id = self.encode_flow_id(pkt_fields['ip_src'],ip_dst)
print('path: ', flow_id, ': ', next_ports)
#add a rule to remove mpls and set ip_desAddr to publisher ip
if msg_datapath.id in self.icn_switches:
ins = [parser.OFPInstructionGotoTable(table_id=2)]
actions = [parser.OFPActionPopMpls(ethertype=2048),
parser.OFPActionSetField(ipv4_dst=flow_id)]
match = parser.OFPMatch(eth_type=ether_types.ETH_TYPE_MPLS,
mpls_label=pkt_fields['mpls_label'])
self.add_flow(msg_datapath, 1, 1, match, actions, instruction=ins)
#send back the packet to the switch for matching operations
#data = None
# if msg.buffer_id == ofproto.OFP_NO_BUFFER:
# print("data_mpls=msg.data")
# data = msg.data
actions.append(parser.OFPActionSetField(ip_dscp=iport))
actions.append(parser.OFPActionOutput(SH_IN_PORT))
#actions.append(parser.OFPActionOutput(oport))
out = parser.OFPPacketOut(datapath=msg_datapath, buffer_id=msg.buffer_id,
in_port=iport, actions=actions)
else:
next_hop = next_ports[2]
oport = self.net[msg_datapath.id][next_hop]['port']
ins = [parser.OFPInstructionGotoTable(table_id=1)]
actions = [parser.OFPActionPopMpls(ethertype=2048),
parser.OFPActionSetField(ipv4_dst=flow_id)]
match = parser.OFPMatch(eth_type=ether_types.ETH_TYPE_MPLS,
mpls_label=pkt_fields['mpls_label'])
self.add_flow(msg_datapath, 0, 2, match, actions, instruction=ins)
actions.append(parser.OFPActionOutput(oport))
out = parser.OFPPacketOut(datapath=msg_datapath, buffer_id=msg.buffer_id,
in_port=iport, actions=actions)
#config table 2 flows and defaut flows of table 3 to goto SH
if self.RIB.add_flow(flow_id,iport, next_ports)==0:
self.create_ndn_datapath(msg,pkt_fields,flow_id,next_ports)
return out
def create_ndn_datapath(self, msg, pkt_fields,flow_id, next_ports):
msg_datapath = msg.datapath
parser = msg_datapath.ofproto_parser
iport = msg.match['in_port']
#add a rule to set ip_tos to in_port
ss = next_ports.index(msg_datapath.id)
for switch in next_ports[ss:len(next_ports)-1]:
msg_datapath = self.switches_dp[switch]
next_hop = next_ports[next_ports.index(switch)+1]
oport = self.net[switch][next_hop]['port']
if switch in self.icn_switches:
#print('add flow for switch ', switch)
ins = [parser.OFPInstructionGotoTable(table_id=3)]
actions = [parser.OFPActionSetField(ip_dscp=iport)]
match = parser.OFPMatch(in_port=iport, eth_type=ether_types.ETH_TYPE_IP,
ip_proto=self.INTEREST_PROTOCOL)
self.add_flow(msg_datapath, 2, 2, match, actions, instruction=ins)
match = parser.OFPMatch(in_port=oport, eth_type=ether_types.ETH_TYPE_IP,
ip_proto=self.DATA_PROTOCOL)
self.add_flow(msg_datapath, 2, 2, match, None, instruction=ins)
# send interest packets to SH
actions = [parser.OFPActionOutput(SH_IN_PORT)]
#actions = [parser.OFPActionOutput(oport)]
#print('add flow for table 3 in switch ', switch)
match = parser.OFPMatch(in_port=iport,eth_type=ether_types.ETH_TYPE_IP,
ip_proto=self.INTEREST_PROTOCOL)
self.add_flow(msg_datapath, 3, 1, match, actions)
# send data packets on backward path to the service host
actions = [parser.OFPActionOutput(SH_IN_PORT)]
#actions = [parser.OFPActionOutput(iport)]
match = parser.OFPMatch(in_port=oport,eth_type=ether_types.ETH_TYPE_IP,
ip_proto=self.DATA_PROTOCOL)
self.add_flow(msg_datapath, 3, 2, match, actions)
# Add Forward interest path to the destination
actions = [parser.OFPActionOutput(oport)]
match = parser.OFPMatch(in_port=SH_OUT_PORT, eth_type=ether_types.ETH_TYPE_IP,
ip_proto=self.INTEREST_PROTOCOL, ipv4_dst=flow_id)
#match = parser.OFPMatch(mpls_label=mpls_label, in_port=SH_PORT)
self.add_flow(msg_datapath, 3, 3, match, actions)
# Add backward data path to the source
actions = [parser.OFPActionDecNwTtl(),parser.OFPActionOutput(iport)]
match = parser.OFPMatch(in_port=SH_OUT_PORT, eth_type=ether_types.ETH_TYPE_IP,
ip_proto=self.DATA_PROTOCOL, ip_dscp=iport)
self.add_flow(msg_datapath, 3, 4, match, actions)
else:
print('Create channel for forwarding on virtual link in order to forward in non ICN switch')
print('flow_id:', flow_id, ',switch:', switch, ',next_switch:',next_hop ,',in port: ', iport, 'oport:', oport)
#for interests
actions = [parser.OFPActionOutput(oport)]
match = parser.OFPMatch(in_port=iport, eth_type=ether_types.ETH_TYPE_IP, ip_proto=self.INTEREST_PROTOCOL,
ipv4_dst=flow_id)
self.add_flow(msg_datapath, 1, 1, match, actions)
#for data
actions = [parser.OFPActionDecNwTtl(), parser.OFPActionOutput(iport)]
match = parser.OFPMatch(in_port=oport, eth_type=ether_types.ETH_TYPE_IP, ip_proto=self.DATA_PROTOCOL,
ipv4_dst=flow_id)
self.add_flow(msg_datapath, 1, 1, match, actions)
print('finding iport from next_hop '+str(next_hop)+ ' to switch ' + str(switch))
print(self.net[next_hop])
if 'port' in self.net[next_hop][switch]:
iport = self.net[next_hop][switch]['port']
#send back the packet to the switch for matching operations
oport = self.net[msg.datapath.id][next_ports[next_ports.index(msg.datapath.id)+1]]['port']
# data = None
# if msg.buffer_id == ofproto.OFP_NO_BUFFER:
# print("data_ndn=msg.data")
# data = msg.data
#actions = actions.append(parser.OFPActionOutput(SH_IN_PORT))
actions = [parser.OFPActionSetField(ip_dscp=iport), parser.OFPActionOutput(SH_IN_PORT)]
out = parser.OFPPacketOut(datapath=msg.datapath, buffer_id=msg.buffer_id,
in_port=iport, actions=actions)
return out
def create_legacy_datapath(self,msg, pkt_fields):
"""
forward any other packets except NDN packets
:param msg: target incoming msg
:param out_port: the port to forward packet on if necessary
:return: created packet_out
"""
datapath = msg.datapath
dpid = datapath.id
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
in_port = msg.match['in_port'] # Input port of switch (to the source)
if pkt_fields['ip_dst'] in self.net:
# print 'it is'
path = nx.shortest_path(self.net, pkt_fields['ip_src'], pkt_fields['ip_dst'])
# for switch in path[1:]:
next_hop = path[path.index(dpid)+1]
out_port = self.net[dpid][next_hop]['port']
else:
out_port = ofproto.OFPP_FLOOD
if pkt_fields['eth_dst'] != "ff:ff:ff:ff:ff:ff":
return
actions = [parser.OFPActionOutput(out_port, ofproto.OFPCML_NO_BUFFER)]
match = parser.OFPMatch(eth_type=pkt_fields['eth_type'], ipv4_dst=pkt_fields['ip_dst'])
self.add_flow(datapath, 0, 1, match, actions)
data = None
if msg.buffer_id == ofproto.OFP_NO_BUFFER:
data = msg.data
out = parser.OFPPacketOut(datapath=datapath, buffer_id=msg.buffer_id,
in_port=in_port, actions=actions, data=data)
return out
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
def _packet_in_handler(self, ev):
"""
Packet_In event; Mismatched in switch and it asks controller
:param ev: Event
:return:
"""
msg = ev.msg
datapath = msg.datapath
dpid = datapath.id # Switch id
in_port = msg.match['in_port']
pkt = packet.Packet(msg.data)
pkt_fields = self.packet_decode(pkt)
if pkt_fields is None or pkt_fields['ip_protocol']==-1:
return
self.packet_in_num += 1
# Add hosts to the net graph
if pkt_fields['ip_src'] not in self.net:
print ('add '+ pkt_fields['ip_src'])
self.net.add_node(pkt_fields['ip_src'])
self.net.add_edge(dpid, pkt_fields['ip_src'], port=in_port)
self.net.add_edge(pkt_fields['ip_src'], dpid)
#
if pkt_fields['ip_protocol'] == self.REGISTER_PROTOCOL:
if pkt_fields['mpls_label']==self.HELLO_LABEL:
print('add switch %i as an ICN switch' %dpid)
self.icn_switches.append(dpid)
self.switch_features_handler(ev)
else:
print ('New data registration in %i' % dpid)
self.RIB.add(pkt_fields['mpls_label'],pkt_fields['ip_src'],pkt_fields['eth_src'])
return
# install a flow(role) to avoid packet_in next time
# Interest packets
if pkt_fields['ip_protocol'] == self.INTEREST_PROTOCOL:
# if dst_port == self.INTEREST_PORT:
"""
Interest packets has special ip_protocol number (150)
If ip_protocol == 150 -> Interest packet
"""
print ('New interest in %i ' % dpid )
if (pkt_fields['mpls_label']>0):
out = self.create_mpls_datapath(msg, pkt_fields)
else:
print('packet flow_id: ', pkt_fields['ip_dst'])
path = self.lookup_flow_id_path(pkt_fields['ip_dst'])
out = self.create_ndn_datapath(msg, pkt_fields,pkt_fields['ip_dst'],path)
datapath.send_msg(out)
elif pkt_fields['ip_protocol'] == self.DATA_PROTOCOL:
"""
Data packets has special ip_protocol number (151)
If ip_protocol == 151 -> Data packet
"""
print ('New data in %i' % dpid)
print ('in_port:',in_port)
elif pkt_fields['ip_protocol'] != -1:
"""
Other packets forward normally based on SDN
"""
print ('Not NDN packet %i' % dpid)
# self.logger.info("s%s from:%s to:%s sport:%s dport:%s",
# dpid, et_src, et_dst, in_port, out_port)
out = self.create_legacy_datapath(msg,pkt_fields)
if out is not None:
datapath.send_msg(out)
@set_ev_cls(event.EventSwitchEnter)
def get_topology_data(self, ev):
s_id = ev.switch.dp.id
print('-----------------------------------------------')
print('new switch:',s_id)
links_list = get_link(self,s_id)
while(len(links_list)==0):
links_list = get_link(self,s_id)
links = [(link.src.dpid, link.dst.dpid, {'port': link.src.port_no})
for link in links_list]
self.links.extend(links)
links = [(link.dst.dpid, link.src.dpid, {'port': link.dst.port_no})
for link in links_list]
self.links.extend(links)
self.switches.append(s_id)
print(self.links)
self.net.add_nodes_from(self.switches)
self.net.add_edges_from(self.links)
